RL4111-DU Temperature and Humidity Transmitter

Accurate wireless RHT logger

Part of the Hanwell Pro RL4000RHT Series, the RL4111-DU is a rugged, accurate wireless RHT logger for precise temperature and humidity measurement. These reliable transmitters are used with our renowned Hanwell Pro temperature humidity monitoring system for 24/7 data and instant alarm notifications. Contact us today for your free quotation and signal strength test (we can prove ours to be unrivalled) or to discuss your specific temperature monitoring requirements and application.

Range -40°C to +60°C


✓ Combined temperature & humidity measurement
✓ LCD display showing data readings and a battery life indicator
✓ Superior performance hardware & high accuracy sensors
✓ Easily accessible battery & USB socket
✓ Low power radio for long distance transmission (3km over open ground)
✓ Complies with RoHS, EU & WEEE directives
✓ Carries CE and UKCA Marking

Typical Applications

• Areas with high powder content in the air
• Areas with high moisture content in the air
• Option to use in Hydrogen Peroxide environments with a special filter fitted to the sensor (sold seperately).


For Instrument specification, please click on the Hanwell Pro RL4111-DU transmitter datasheet.


This product is to be used in conjunction with the Hanwell EMS software for comprehensive centralised monitoring.

Compatible products

Software Required:
W900 – Standard Hanwell EMS Software Package
W906 – Validated Hanwell EMS Software Package
*See EMS datasheet for further options

Hardware Required:
SR2 – Smart Receiver
CR3 – Controller
REP – Repeater

Y550 – Wall mounting bracket
88706 – AA Lithium battery

Contact us for more information about our accurate wireless RHT logger or other temperature and humidity monitoring solutions.

Manufactured by Hanwell | Ellab